Layers of the atmosphere/Air pressure & density

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Across
  1. 2. Works as a shield for living things, protecting them from a lot of the harmful radiation given off by the sun.
  2. 4. 21% of our atmosphere
  3. 7. The layer nearest to the Earth (where all weather happens)
  4. 8. When air pressure shifts while on an airplane,you feel your ears ________.
  5. 9. This is the third layer where temperatures drop resulting in being the coldest layer of the atmosphere.
  6. 10. Beautiful curtains of light
  7. 13. Weight or force of the atmosphere pressing down on any given surface of the Earth.
  8. 15. As the atmosphere ___________ the further you get from Earth's surface, it becomes less dense and air pressure decreases.
  9. 17. The hottest layer of the atmosphere as temperatures increases with altitude.
Down
  1. 1. As an air plane travels higher into the atmosphere, air pressure ___________.
  2. 3. 78% of our atmosphere
  3. 5. This is the layer where most airplanes fly and is where the protective ozone layer lies
  4. 6. Our Earth is surrounded by a mixture of gasses called?
  5. 11. Distance from the Earth
  6. 12. Outermost layer of the atmosphere
  7. 14. How compact molecules are in a solid, liquid, or gas.
  8. 16. How many layers is our atmosphere organized in?